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Note 2 - Income Per Share (Details Textual) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Restricted Stock [Member]        
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares) 305,000 193,000 271,000 209,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 0   0  
Share-Based Payment Arrangement, Option [Member]        
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements (in shares) 182,000 0 109,000 0
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 0 0 15,000 0